Bloch Walls and Macroscopic String States in Bethe's solution of the Heisenberg Ferromagnetic Linear Chain

Details Bloch Walls and Macroscopic String States in Bethe's solution of the Heisenberg Ferromagnetic Linear Chain Bloch Walls and Macroscopic String States in Bethe's solution of the Heisenberg Ferromagnetic Linear Chain

2000-05-24

arxiv.org/abs/cond-mat/0005397v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, RevTex, 2 figures, Submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.85.2813

We present a calculation of the lowest excited states of the Heisenberg
ferromagnet in 1-d for any wave vector. These turn out to be string solutions
of Bethe's equations with a macroscopic number of particles in them. These are
identified as generalized quantum Bloch wall states, and a simple physical
picture provided for the same.

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